A viral Facebook post recently alleged that Goldfish crackers contain dangerous amounts of the weedkiller glyphosate. Is there any science behind this claim? Never mind the rumors you've heard; the COVID vaccine has not been added to our food supply. Could using marijuana cause schizophrenia? A recent study suggests a link between the two, but how compelling is the research?

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Join guest host Dr. Liza Dunn and GLP contributor Cameron English on episode 219 of Science Facts and Fallacies as they break down these latest news stories:

Glyphosate fact check: Micro-traces in food do not constitute a ‘dangerously high amount of weedkiller’

Are goldfish crackers contaminated by dangerous amounts of glyphosate? A viral Facebook reel recently spread that alarming message to millions of parents, but the evidence—gathered by independent scientists all over the world—continues to show that consumers of all ages are exposed to only trace amounts of this pesticide, which cannot possibly cause any harm. Moms and dads can rest assured that this popular snack poses no chemical risk to their children.

Snopes fact-checks claims by ‘deep state conspiracy grifters’ that US government adds COVID vaccines into our food supply

Some critics of the COVID vaccines have claimed the US government is developing edible plants that contain the mRNA found in Pfizer's and Moderna's shots. Rumors that the vaccines are entering the food supply through immunized animals have also spread like wildfire. The problem? There is no edible vaccine anywhere close to commercialization, and no mRNA shots have been approved for veterinary use.

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Marijuana and psychosis: Cannabis use linked to 30% of diagnoses in young men

There are few topics more polarizing than drug use. And a recent study linking heavy cannabis use to schizophrenia has only intensified the debate. The research generated a lot of media attention and support from some experts, though critics were quick to point out its limitations. Who's right here? Is marijuana a relatively harmless substance, or a potential cause of a serious psychological disorder?

Dr. Liza Dunn is a medical toxicologist and the medical affairs lead at Bayer Crop Science. Follow her on Twitter @DrLizaMD

Cameron J. English is the director of bio-sciences at the American Council on Science and Health.